>>>This one:
>>>
>>>http://support.microsoft.com/default.aspx/kb/952548
>>>
>>>While it talks of BROWSE windows, does anyone know if this bug can manifest itself with grids?
>>
>>Browse is a grid. I.e. the browse command uses a grid internally to display its results.
>>
>
>Yes, I wasn't stating my question very well, was I ?

The ambiguity is in the KB article. It doesn't say how is the relationship established - via set relation or via grid's properties. But then, seeing that you are experiencing exactly the problem it describes, ...

>So, hotfix or revert to SP1 - that is the question. Neither appeals to me.

...it really is a dilemma. Can you just try it out with the hotfix on a couple of machines?